No I know, I was just giving my opinion on it. Again I don't see any enjoyment in driving around to different areas of the menu. It might seem fun the first few times but pretty soon it'll be "Damn, I've got another 10 minute drive to the Mercedes dealership again" and you'll use the skip option, if it exists. Making the whole thing a waste of time.
Which is why that shouldn't be where the focus lies, but instead on the open / public roads you mentioned previously. There is a unique challenge to driving narrow, winding roads that you don't know that well, if at all. Sure, it's basically a tarmac rally - but that's not a bad thing is it? Wouldn't it be great if the whole world were your own private free-form rally course?

(For clarification, that's my fantasy of "Open World Free Roam" in GT, a web of interconnected "driving roads".)
As for realistic driving not being appealing, I thought realism was the Holy Grail with you!

I find sims like GTR2 have the same dour dryness to them as your average
<insert boyhood fascination> Simulator game, probably because their lineages and motivations are linked. Of course, that's not what GT is about, but that doesn't mean people shouldn't be able to do a bit of it in GT if they want to - diversity should never be punished. It just depends on what you're interested in (which I appreciate you've stated).
I grew up with various sims, so my view on things like this Euro Truck game is that it's fun as an interesting / new challenge, a way to broaden your perspective - they're also great retirement toys, I imagine. I never knew how tricky it was to pilot a big barge into dock until I gave that a go in a simulator, and that's with real-world experience of small but equally unmaneuvrable craft. I also have a fascination with steam locomotives - but that's also partly because I've had experience with industrial boilers (both in operation and "design"), and it amazes me that they were used as transport. Like most people, I'm not likely to get to do these things in real life, so that's what they're for, really.
But then again, maybe I'm just odd. Even more odd is how Euro Truck 2 was a top seller on Steam... All those ironic youths, eh?